v2.10

This release introduces detailed impairments for ROADMs:
ROADM impairments can be defined per degree and roadm-path type (add, drop or express).
Minimum loss when crossing a ROADM is no more 0 dB. It can be set per ROADM degree with roadm-path-impairments.

The transceiver output power, which was previously set using the same parameter as the input span power (power_dbm),
can now be set using a different parameter.